$ cd ~/projects/garmin/
$ git clone https://github.com/klimeryk/vim-monkey-c.git
$ mkdir -p ~/.vim/syntax ~/.vim/ftdetect
$ cp ~/projects/garmin/vim-monkey-c/ftdetect/monkey-c.vim ~/.vim/ftdetect/
$ cp ~/projects/garmin/vim-monkey-c/syntax/monkey-c.vim ~/.vim/syntax/

• install prerequisites (not available on 20.04)

# apt install libwebkitgtk-1.0-0 default-jre

• download Connect IQ SDK from here
• install it

$ cd Downloads
$ unzip connectiq-sdk-manager-linux.zip

• run it

$ ./bin/sdkmanager

• install SDK and Devices
• set up PATH

$ export PATH=$PATH:$(cat $HOME/.Garmin/ConnectIQ/current-sdk.cfg)/bin

• compile project and run it in simulator

$ monkeyc -d fenix6xpro -f projects/garmin/garmin_test/monkey.jungle -o projects/garmin/garmin_test/garmin_test.prg -y projects/garmin/developer_key
$ connectiq
$ monkeydo ~/projects/garmin/garmin_test/garmin_test.prg fenix6xpro

• Install Oracle Java Runtime Environment 8
• Install the Connect IQ SDK manager
• set PATH to Connect IQ tools and Java

$ set PATH=%PATH%;c:\Users\jdambors\AppData\Roaming\Garmin\ConnectIQ\Sdks\connectiq-sdk-win-3.2.5-2021-02-12-6d31f4357\bin
$ set PATH=%PATH%;c:\Program Files\Java\jre1.8.0_281\bin

• launch Connect IQ simulator

$ connectiq

• run Monkey C compiler

$ monkeyc -d fenix6xpro -f c:\Users\jdambors\eclipse-workspace\garmin_test\monkey.jungle -y d:\Garmin\developer_key -o d:\garmin_test.prg

• run Connect IQ executable in simulator

$ monkeydo myApp.prg fenix5plus